And now another issue has reared its ugly head: After 'fixing' the mp3 issues and continuing to calculate replaygain in my music, I have noticed that some AAC data containing files (m4as containing either LC AAC or HE AAC) will cause a crash if I attempt to process them with the replaygain calculator.

This has happened at least twice now and has utterly destroyed the files in question - the files themselves exist on the hard drive but presently are nothing more than dead space as all information that allows a media player to identify them and play them is now apparently gone.

These were files extracted off of CDs using older versions of Winamp itself.